What to do if professor comments on candidate's age in an admissions interview?

I'm 34. I received a degree in computer in 2008 and have been running a business ever since. Recently, I decided to apply for a postgraduate program in healthcare in January. To show that I was interested in health care, I completed a one year certificate course in a related field last year. A few days after I had submitted my application form and two strong recommendations, they arranged an interview for me.

The interviewers were friendly at first, and the questions were not very tough. I was feeling confident until the senior interviewer (Prof. Joe) suddenly asked me if I wanted to become a nurse. I said yes. He smiled but then told me that all successful applicants last year were twenty something (at least 12 years younger than me.) I was taken aback by his comment. Was that a negative connotation?

Edited to add:

1. 
   

   I had read the professional recognition information on their web. The programme is accreditated by the nursing council and graduates are eligible to apply for registration as nurse, so I could not understand why he asked if I wanted to become a nurse.

   
   


2. 
   

   The certificate course tutor had told us about the average age of nurse population.